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The final training and assessment stage for a new entry gas engineer is ACS Initial Assessment.

To be eligible for ACS Initial Assessment, you must have followed an approved managed learning programme, including a mandatory on-site portfolio building stage.
In some circumstances, experienced gas engineers may also need to undertake ACS Initial Assessments. Reassessment usually arises because operatives ACS Gas Qualifications have lapsed and expired more than 12 months ago.

Upon successful completion of your ACS Initial Assessment, you will have gained the appropriate ACS qualifications to apply to become a member of the Gas Safe Register.
If you are new to the industry and thinking of starting gas training, please see our ACS Gas Training Course page for a full explanation of the route that you must follow.

ACS process

ACS Initial Assessment last for approximately two weeks. It incorporates the full domestic suite of gas appliances:

  • CCN1 - Core Gas Safety (Includes CPA 1 - Flue Gas Analysers
  • HTR1 - Gas Fires
  • CKR1 - Gas Cookers
  • CENWAT - Central heating, gas boilers and water heaters

Before you can book yourself onto the course, you must be able to satisfy strict criteria. For example, external candidates must be able to prove that they have undergone approved training. In addition, all candidates must have completed an acceptable on-site portfolio under the supervision of a registered gas engineer.

Trainees will receive 3-days refresher training ahead of the assessment. The ACS assessment process will then begin.

Under exam conditions, you will undergo a series of written assessments that include open and closed book multiple choice papers. You will also need to be assessed practically for every appliance and discipline that forms part of your ACS Initial Assessment.

Following a successful assessment, you will be ready to join the Gas Safe Register as an approved operative either in your own right or on behalf of a Gas Safe Registered company.

ACS Initial Assessment at Options Skills
ACS Initial Assessment at Options Skills

Additional Information

You will be required to provide us with:

  • Your National Insurance number
  • 2 recent colour photographs
  • Completed portfolio of evidence, supervised and signed off by a registered gas engineer.

If you come under the category of someone who has held ACS, but this expired more than 12 months ago, please be aware that training is not required before assessment.

Once you have successfully attained your ACS Gas qualifications, you may contact Gas Safe Register and apply for membership.

You must renew ACS Gas Qualifications every 5-years. This ensures that all practising gas engineers are always aware of current legislation and best practice within the industry.

Please note: Acceptance to this course is subject to you demonstrating that you have followed an approved gas learning plan. If you are a brand new entrant to the Plumbing and Gas Industry, you may consider the ACS Gas Training Course that incorporates pipework skills before you can enrol on this course.

If you are an existing Gas Fitter, you will be able to undertake the ACS Renewal Course.

Up to 31st December 2020, Regulated qualifications and UKAS Accredited certificates of competence issued in the UK were widely recognised by other EU member states. However, since the UK’s withdrawal from the EU, individual member states that previously recognised a UK qualification may now no longer do so. Learners undertaking qualifications on the basis that it is recognised by an EU member state should, in the first instance, make enquiries with the relevant bodies in that Country to confirm its recognition status.